Dell GX240 User's Guide - Page 79

NOTE: After you open and close the cover, the chassis intrusion detector causes the following message to appear on the screen at the next computer start-up: ALERT! Cover was previously removed. 14 Reset the chassis intrusion detector by changing Chassis Intrusion to Enabled or Enabled-Silent. NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector. 15 If you installed a sound card, perform the following steps: a Enter system setup, select Integrated Devices, and change the setting for Sound to Off. 16 Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone, or line-in connectors on the I/O panel (see "I/O Panel-Small Form-Factor, Desktop, and Mini-Tower Computers"). 17 If you installed an add-in network adapter, perform the following steps: a Enter system setup, select Integrated Devices and change the setting for Network Interface Card to Off. b Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the I/O panel (see "I/O Panel-Small Form-Factor, Desktop, and Mini-Tower Computers"). Removing an Expansion Card CAUTION: Before you perform this procedure, see "CAUTION: Safety Instructions." NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see "System Board Components." 1 Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 to 20 seconds. 2 Open the computer cover. 3 In the small desktop computer, remove the expansion-card cage. NOTE: Problems may arise if two expansion cards are trying to use the same resources: memory, I/O addresses, and IRQs. To avoid this type of conflict, see "Interrupt Assignment Conflicts" and the documentation that came with the card for more information. Installing Upgrades 77